/** @file | |
EFI SMM Access2 Protocol as defined in the PI 1.2 specification. | |
This protocol is used to control the visibility of the SMRAM on the platform. | |
It abstracts the location and characteristics of SMRAM. The expectation is | |
that the north bridge or memory controller would publish this protocol. | |
The principal functionality found in the memory controller includes the following: | |
- Exposing the SMRAM to all non-SMM agents, or the "open" state | |
- Shrouding the SMRAM to all but the SMM agents, or the "closed" state | |
- Preserving the system integrity, or "locking" the SMRAM, such that the settings cannot be | |
perturbed by either boot service or runtime agents | |
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#ifndef _SMM_ACCESS2_H_ | |
#define _SMM_ACCESS2_H_ | |
#include <Protocol/MmAccess.h> | |
#define EFI_SMM_ACCESS2_PROTOCOL_GUID EFI_MM_ACCESS_PROTOCOL_GUID | |
typedef EFI_MM_ACCESS_PROTOCOL EFI_SMM_ACCESS2_PROTOCOL; | |
typedef EFI_MM_OPEN EFI_SMM_OPEN2; | |
typedef EFI_MM_CLOSE EFI_SMM_CLOSE2; | |
typedef EFI_MM_LOCK EFI_SMM_LOCK2; | |
typedef EFI_MM_CAPABILITIES EFI_SMM_CAPABILITIES2; | |
extern EFI_GUID gEfiSmmAccess2ProtocolGuid; | |
#endif |